.beijin{
    width: 100%;
    height: auto;
    background-color: black;
  
}
.io{
    width: 100%;
    height: 700px;
    display: flex;
    justify-content:center;
}

.ioimg{
    margin-top: 100px;
    width: 25%;
    height: 500px;
    margin-left: -50px;

}
.iotext{
    color: white;
    width: 40%;
    height: 80%;
    margin-top: 200px;
}
.iotext1{
    font-size: 43px;
    width: 60%;
    margin-left: 135px;
}
.iotext2{

    font-size: 20px;
    margin-top: -30px;
    margin-left: 220px;
    width: 70%;

}
.iotext3{
    font-size: 43px;
    width: 60%;
    margin-left: -50px;
}
.iotext4{

    font-size: 20px;
    margin-top: -30px;
    margin-left: 30px;
    width: 70%;

}
